WO2023016359A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2023016359A1
WO2023016359A1 PCT/CN2022/110478 CN2022110478W WO2023016359A1 WO 2023016359 A1 WO2023016359 A1 WO 2023016359A1 CN 2022110478 W CN2022110478 W CN 2022110478W WO 2023016359 A1 WO2023016359 A1 WO 2023016359A1
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WO
WIPO (PCT)
Prior art keywords
pbch
frequency domain
physical resource
pattern
subcarriers
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Application number
PCT/CN2022/110478
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English (en)
Chinese (zh)
Inventor
侯海龙
金哲
罗之虎
曲韦霖
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP22855340.0A priority Critical patent/EP4376473A1/fr
Publication of WO2023016359A1 publication Critical patent/WO2023016359A1/fr
Priority to US18/437,423 priority patent/US20240179728A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present application relates to the communication field, and in particular to a communication method and a communication device.
  • terminal devices can synchronize with network devices and obtain system information by receiving synchronization signals and physical broadcast channel blocks (synchronization signal and physical broadcast channel block, SSB).
  • synchronization signal and physical broadcast channel block synchronization signal and physical broadcast channel block, SSB.
  • SSB physical broadcast channel block
  • SSB physical broadcast channel block
  • the communication method and device provided in the embodiments of the present application can solve the problem of narrowband PBCH transmission and improve the transmission performance of PBCH in the narrowband system.
  • a communication method is provided, and the method may be executed by a terminal device or a chip configured in the terminal device.
  • the method includes: determining a first physical resource, where the first physical resource is a physical resource to which a first physical broadcast channel PBCH and a first PBCH DMRS are mapped; receiving the first PBCH on the first physical resource; Wherein, the first PBCH is the PBCH in the first SSB, and the first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, and the X is a positive integer less than 240. In this solution, the subcarriers occupied by the first SSB in the frequency domain are less than 240, which can enable PBCH transmission in the narrowband system.
  • the method further includes: acquiring system information carried by the first PBCH, where the number of bits of the system information is less than 32.
  • the reduction of physical resources used to transmit the PBCH will lead to a decrease in the transmission performance of the PBCH and affect the access of terminal equipment to the cell. Therefore, compared with the existing PBCH load size of 32 bits, the first PBCH load becomes smaller, thereby reducing the code rate and improving the performance of the first PBCH.
  • a communication method is provided, which can be executed by a network device or a chip configured in the network device.
  • the network device may be a radio access network device, or may be a network unit implementing corresponding functions of the radio access network device.
  • the method includes: mapping the first PBCH and the first PBCH DMRS to a first physical resource; sending the first PBCH and the first PBCH DMRS; wherein, the first PBCH is the PBCH in the first SSB, and the first PBCH
  • One SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240. In this solution, the first SSB occupies less than 240 subcarriers in the frequency domain, which can enable SSB transmission in a narrowband system.
  • the method further includes: generating system information carried by the first PBCH, where the number of bits of the system information is less than 32.
  • the X is greater than 127.
  • the number of subcarriers occupied by the existing PSS or SSS in the frequency domain is 127, so the existing synchronization sequence can be used to ensure the synchronization performance.
  • the same synchronization detection algorithm is used to reduce implementation complexity.
  • the X is 180.
  • the frequency domain bandwidth of the first SSB is 2.7 MHz, which is applicable to a system bandwidth not greater than 3.6 MHz. If the system bandwidth is 3 MHz, 0.3 MHz can be reserved on both sides of the first SSB as a guard frequency band. At this time, the guard band occupies 10% of the system bandwidth, and the resource utilization rate is high.
  • the X is 216.
  • the frequency domain bandwidth of the first SSB is 3.24 MHz, which is applicable to a system bandwidth not greater than 3.6 MHz. If the system bandwidth is 3.6 MHz, 0.36 MHz can be reserved on both sides of the first SSB as a guard frequency band. At this time, the guard band occupies 10% of the system bandwidth, and the resource utilization rate is high.
  • the X is 150.
  • the frequency domain bandwidth of the first SSB is 4.5 MHz, which is applicable to a system bandwidth not greater than 7.2 MHz. If the system bandwidth is 5 MHz, 0.5 MHz can be reserved on both sides of the first SSB as a guard band. At this time, the guard band occupies 10% of the system bandwidth, and the resource utilization rate is high.
  • the first physical resource includes all REs on the second symbol and the fourth symbol, and also includes Y REs on the third symbol, where Y is a positive integer less than 96 .
  • the first physical resource only includes all REs on the second symbol and the fourth symbol, that is, the first physical resource does not include the REs on the third symbol.
  • a communication method is provided, and the method may be executed by a terminal device or a chip configured in the terminal device.
  • the method includes: determining a first physical resource according to a first frequency domain pattern or a first resource unit RE pattern, and the first frequency domain pattern or the first RE pattern is a second frequency domain pattern or a part of patterns included in the second RE pattern ; Receive a first PBCH, where the first PBCH is located in the first physical resource.
  • This scheme introduces two patterns, the first frequency domain pattern or the first RE pattern is used for the narrowband spectrum, and the second frequency domain pattern or the second RE pattern is used for the broadband spectrum, because the first frequency domain pattern or the first RE pattern It is a part of the second frequency domain pattern or the second RE pattern, that is, without introducing a variety of different patterns, the system can adaptively configure a suitable pattern according to the system bandwidth, and the compatibility is good, especially for those with narrowband access and broadband access input terminal equipment.
  • the method further includes: acquiring system information carried by the first PBCH, where the number of bits of the system information is less than 32.
  • the load of the first PBCH becomes smaller, which can reduce the code rate, which is beneficial to improve the performance of the first PBCH.
  • the method further includes: determining a second physical resource, where the second physical resource and the first physical resource are located in different time domain resources; receiving the second PBCH, the first The second PBCH is located on the second physical resource. Further, the method further includes: acquiring the system information according to the first PBCH and the second PBCH. The terminal equipment combines the first PBCH and the second PBCH, which can improve the transmission performance of system information and increase the success probability of accessing a cell.
  • a communication method is provided, and the method may be executed by a network device or a chip configured in the network device.
  • the network device may be a radio access network device, or may be a network unit implementing corresponding functions of the radio access network device.
  • the method includes: mapping a first PBCH to a first physical resource according to a first frequency domain pattern or a first resource element RE pattern, and the first frequency domain pattern or the first RE pattern is a second frequency domain pattern or a second RE A part of patterns included in the pattern; sending the first PBCH, where the first PBCH is located in the first physical resource.
  • the network device can adaptively configure a suitable pattern according to the system bandwidth, and the compatibility is better.
  • the method further includes: generating system information carried by the first PBCH, where the number of bits of the system information is less than 32.
  • the method further includes: mapping the second PBCH to a second physical resource, where the second physical resource and the first physical resource are located in different time domain resources; sending the A second PBCH, where the second PBCH is located in the second physical resource.
  • the first frequency domain pattern or the first RE pattern is a frequency domain resource pattern or a resource unit pattern in the first resource region
  • the second frequency domain pattern or the second RE pattern is a resource element pattern in the second resource region.
  • the frequency domain resource pattern or resource unit pattern, the first resource region is a part of the second resource region
  • the first frequency domain pattern or the first RE pattern is the second frequency domain pattern or the second A pattern of RE patterns in the first resource region.
  • the second resource region occupies 4 consecutive symbols in the time domain and 240 consecutive subcarriers in the frequency domain; the first resource region occupies the 4 consecutive symbols in the time domain and Occupying X subcarriers in the 240 consecutive subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the X is 144, 150, 180, 192 or 216.
  • the REs in the second RE pattern include: all 240 REs on the second symbol of the 4 symbols, all 240 REs on the fourth symbol of the 4 symbols, in The 96 REs on the third symbol of the 4 symbols, where the 96 REs are located in the first 48 subcarriers and the last 48 subcarriers of the 240 subcarriers in the frequency domain.
  • the REs in the first RE pattern include: the middle X REs, the first X REs, or the last X REs on the second symbol of the 4 symbols; The middle X REs, the first X REs, or, the last X REs on the fourth symbol; the middle Y of the 96 REs, the first Y REs on the third symbol of the 4 symbols RE, or, the last Y REs, Y is a positive integer less than 96.
  • the coding bits of the first PBCH are determined according to the first frequency domain pattern.
  • the coded bits of the first PBCH and the coded bits of the second PBCH are determined according to the second frequency domain pattern; the first PBCH is mapped in ascending order of subcarrier indexes, The second PBCH is mapped in descending order of subcarrier indexes.
  • the coding bits transmitted by the first PBCH and the second PBCH are different.
  • the UE combines the first PBCH and the second PBCH to obtain greater coding gain, thereby improving the transmission performance of system information and increasing the probability of UE accessing a cell.
  • a communication method is provided, and the method may be executed by a terminal device or a chip configured in the terminal device.
  • the method includes: receiving the first PBCH; acquiring system information carried by the first PBCH, where the number of bits of the system information is less than 32.
  • the first PBCH load becomes smaller, thereby reducing the code rate and improving the performance of the first PBCH.
  • the physical resources used to transmit the PBCH are reduced, and the number of system information bits is reduced, which can improve the transmission performance of the PBCH.
  • a communication method is provided, and the method may be executed by a network device or a chip configured in the network device.
  • the network device may be a radio access network device, or may be a network unit implementing corresponding functions of the radio access network device.
  • the method includes: generating system information carried by the first PBCH, where the number of bits of the system information is less than 32; and sending the first PBCH.
  • the system information does not include at least one of the following information: "subCarrierSpacingCommon” information, "dmrs-TypeA-Position” information, or "pdcch-ConfigSIB1" information.
  • the information bits of the "pdcch-ConfigSIB1" included in the system information are less than 8.
  • the number of bits of the physical layer information contained in the system information is less than 8.
  • the first PBCH is the PBCH in the first SSB
  • the first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the subcarriers occupied by the first SSB in the frequency domain are less than 240, which can enable SSB transmission in the narrowband system.
  • a communication device including various modules or units for performing the method in any possible implementation manner of the first aspect, the third aspect, or the fifth aspect.
  • An eighth aspect provides a communications device, including various modules or units configured to execute the method in any possible implementation manner of the second aspect, the fourth aspect, or the sixth aspect.
  • a communication device including a processor.
  • the processor is coupled with the memory, and may be used to execute instructions in the memory, so that the communication device executes the method in any possible implementation manner of the first aspect, the third aspect, or the fifth aspect above.
  • the communication device further includes a memory.
  • the communication device further includes a transceiver and/or an antenna.
  • the communication device may be a terminal device or a chip configured in the terminal device.
  • a communication device including a processor.
  • the processor is coupled with the memory, and can be used to execute instructions in the memory, so that the communication device executes the method in any possible implementation manner of the second aspect, the fourth aspect, or the sixth aspect.
  • the communication device further includes a memory.
  • the communication device further includes a transceiver and/or an antenna.
  • the communication device may be a network device or a chip configured in the network device.
  • a terminal device which can implement the method in any possible implementation manner of the first aspect, the third aspect, or the fifth aspect.
  • the terminal device may be a chip (such as a communication chip, etc.) or a user device, and the above method may be implemented by software, hardware, or by executing corresponding software by hardware.
  • the terminal device includes a processor and a memory; the processor is configured to support the terminal device to execute any possible implementation of the first aspect, the third aspect, or the fifth aspect Corresponding functions in the method; the memory is used to store instructions and/or data.
  • the terminal further includes a radio frequency circuit and an antenna.
  • the terminal device includes a processing device and a transceiver unit.
  • the processing device includes a processor and a memory, configured to execute the actions implemented by the terminal device in any possible implementation method of the first aspect, the third aspect, or the fifth aspect;
  • the transceiver unit includes a radio frequency circuit and The antenna is used to execute the actions of the terminal device to transmit or receive from the outside.
  • the terminal device includes a processor and a transceiver.
  • the processor is configured to support the terminal device to execute the method in any possible implementation manner of the first aspect, the third aspect, or the fifth aspect.
  • the transceiver may be an input-output unit, such as an input-output circuit or an input-output interface.
  • the terminal device may include a unit module that performs corresponding actions in any possible implementation method of the first aspect, the third aspect, or the fifth aspect.
  • a twelfth aspect provides a network device that can implement the method in any possible implementation manner of the second aspect, the fourth aspect, or the sixth aspect.
  • the network device may be a chip (such as a baseband chip, or a communication chip, etc.) or a base station device, and the above method may be implemented by software, hardware, or by executing corresponding software on hardware.
  • the network device includes a processor and a memory.
  • the processor is configured to support the network device to execute the method in any possible implementation manner of the second aspect, the fourth aspect, or the sixth aspect;
  • the memory is configured to store instructions and/or data.
  • the network device further includes a radio frequency unit and an antenna.
  • the network device includes a baseband unit and a transceiver unit.
  • the baseband unit is used to execute the actions implemented inside the network device in any possible implementation method of the second aspect, the fourth aspect or the sixth aspect; The action received externally.
  • the network device includes a processor and a transceiver.
  • the processor is configured to support the network device to execute the method in any possible implementation manner of the second aspect, the fourth aspect, or the sixth aspect.
  • the transceiver may be an input-output unit, such as an input-output circuit or an input-output interface.
  • the network device may include a unit module that performs corresponding actions in any possible implementation method of the second aspect, the fourth aspect, or the sixth aspect.
  • a communication unit is provided, and the communication unit can realize part of functions of a network device.
  • the communication unit is a radio frequency unit.
  • the radio frequency unit includes radio frequency functions and/or bottom layer functions in the physical layer.
  • the radio frequency unit may include a unit module for performing corresponding actions in any possible implementation method of the second aspect, the fourth aspect, or the sixth aspect.
  • the communication unit is a distributed unit.
  • the distributed unit includes RLC layer, MAC layer and/or high-level functions in the physical layer.
  • the distributed unit may include a unit module that performs corresponding actions in any possible implementation method of the second aspect, the fourth aspect, or the sixth aspect.
  • the communication unit is a centralized unit.
  • the centralized unit includes PDCP and RRC functions.
  • the centralized unit may include a unit module for performing corresponding actions in any one of the possible implementation methods of the second aspect, the fourth aspect, or the sixth aspect.
  • a computer-readable storage medium which stores computer programs or instructions, and when the computer programs or instructions are executed, any possibility of the above-mentioned first aspect, third aspect or fifth aspect can be realized method in the implementation.
  • a fifteenth aspect provides a computer-readable storage medium storing computer programs or instructions, and when the computer programs or instructions are executed, any possibility of the above-mentioned second aspect, fourth aspect or sixth aspect can be realized method in the implementation.
  • a processor including: an input circuit, an output circuit, and a processing circuit.
  • the processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any one of the above aspects or any possible implementation manner of this aspect.
  • the above-mentioned processor is a chip
  • the input circuit is an input pin
  • the output circuit is an output pin
  • the processing circuit is a transistor, a gate circuit, a flip-flop and/or various logic circuits, etc.
  • a computer program product includes: a computer program (also referred to as code, or an instruction), when the computer program is executed, the computer executes the above-mentioned first aspect, the third Aspect or the method in any possible implementation of the fifth aspect.
  • a computer program also referred to as code, or an instruction
  • a computer program product includes: a computer program (also referred to as code, or an instruction), which, when the computer program is executed, causes the computer to perform the above-mentioned second aspect, the fourth Aspect or the method in any possible implementation of the sixth aspect.
  • a computer program also referred to as code, or an instruction
  • Fig. 1 is the schematic diagram of the communication system of the present application.
  • FIG. 2 is a schematic structural diagram of an existing SSB
  • FIG. 3 is a schematic diagram of a synchronous signal burst set
  • FIG. 4A is a schematic structural diagram of an SSB provided by the present application.
  • FIG. 4B is a schematic structural diagram of another SSB provided by the present application.
  • FIG. 4C is a schematic structural diagram of another SSB provided by the present application.
  • FIG. 4D is a schematic structural diagram of another SSB provided by the present application.
  • FIG. 5A is a schematic diagram of resource mapping of two SSBs provided by the present application.
  • FIG. 5B is another schematic diagram of resource mapping of two SSBs provided by the present application.
  • FIG. 5C is another schematic diagram of resource mapping of two SSBs provided by the present application.
  • FIG. 6 is a flowchart of a communication method provided by the present application.
  • Fig. 7 is the PBCH processing flowchart provided by the present application.
  • FIG. 8A is a schematic diagram of punching a PBCH provided by the present application.
  • FIG. 8B is a schematic diagram of punching another PBCH provided by the present application.
  • FIG. 8C is a schematic diagram of punching another PBCH provided by the present application.
  • FIG. 9 is a flowchart of another communication method provided by the present application.
  • FIG. 10 is a schematic structural diagram of a communication device provided by the present application.
  • FIG. 11 is a schematic diagram of communication between communication devices provided by the present application.
  • Fig. 12 is a schematic structural diagram of a network device provided by this application.
  • FIG. 13 is a schematic structural diagram of a terminal device provided by this application.
  • FIG. 14 is a schematic structural diagram of a communication device provided by this application.
  • the method and device provided by the embodiments of the present application can be applied to various communication systems, for example, the fifth generation (5th generation, 5G), new radio (new radio, NR), long term evolution (long term evolution, LTE), Internet of Things (internet of things, IoT), wireless fidelity (wireless-fidelity, WiFi), wireless communication related to the third generation partnership project (3rd generation partnership project, 3GPP), or other wireless communication that may appear in the future, etc.
  • 5G fifth generation
  • new radio new radio
  • long term evolution long term evolution, LTE
  • Internet of Things Internet of things, IoT
  • wireless fidelity wireless-fidelity
  • WiFi wireless communication related to the third generation partnership project (3rd generation partnership project, 3GPP), or other wireless communication that may appear in the future, etc.
  • 3GPP third generation partnership project
  • FIG. 1 is a schematic diagram of a communication system applicable to this application.
  • the system 100 includes at least one network device, such as the network device 110 shown in FIG. 1 ; the system 100 may also include at least one terminal device, such as the terminal device 120 shown in FIG. 1 .
  • the network device 110 and the terminal device 120 can communicate through a wireless link, and then exchange information. It can be understood that network devices and terminal devices may also be referred to as communication devices.
  • a network device is a network-side device with a wireless transceiver function.
  • the network device may be a device that provides a wireless communication function for a terminal device in a radio access network (radio access network, RAN), and is called a RAN device.
  • the network device may be a base station (base station), an evolved base station (evolved NodeB, eNodeB), a next generation base station (next generation NodeB, gNB) in a 5G mobile communication system, a base station in the subsequent evolution of 3GPP, a sending and receiving point ( transmission reception point, TRP), access nodes in WiFi system, wireless relay nodes, wireless backhaul nodes, etc.
  • a network device may contain one or more co-sited or non-co-sited sending and receiving points.
  • the network device may include one or more centralized units (central unit, CU), one or more distributed units (distributed unit, DU), or one or more CUs and one or more DUs.
  • the function of the CU may be implemented by one entity or different entities.
  • the function of the CU is further divided, that is, the control plane and the user plane are separated and realized by different entities, which are the control plane CU entity (ie, the CU-CP entity) and the user plane CU entity (ie, the CU-UP entity).
  • the CU-CP entity and the CU-UP entity can be coupled with the DU to jointly complete the functions of the access network equipment.
  • part of the functions of the radio access network device can be realized through multiple network function entities.
  • These network functional entities may be network elements in hardware devices, software functions running on dedicated hardware, or virtualized functions instantiated on a platform (for example, a cloud platform).
  • the access network device may be a road side unit (RSU).
  • Multiple access network devices in the communication system may be base stations of the same type, or base stations of different types.
  • the base station can communicate with the terminal equipment, and can also communicate with the terminal equipment through the relay station.
  • the device for realizing the function of the network device may be the network device itself, or a device capable of supporting the network device to realize the function, such as a chip system or a combined device or component capable of realizing the function of the access network device,
  • the device can be installed in network equipment.
  • the system-on-a-chip may be composed of chips, and may also include chips and other discrete devices.
  • a network device is taken as an example to describe the technical solution.
  • a terminal device is a user-side device with a wireless transceiver function, which can be a fixed device, a mobile device, a handheld device (such as a mobile phone), a wearable device, a vehicle-mounted device, or a wireless device built into the above-mentioned devices (such as a communication module , modem, or chip system, etc.).
  • Terminal devices are used to connect people, things, machines, etc., and can be widely used in various scenarios, such as: cellular communication, device-to-device (D2D) communication, V2X communication, machine-to-machine/machine class Communication (machine-to-machine/machine-type communications, M2M/MTC) communication, Internet of Things, virtual reality (virtual reality, VR), augmented reality (augmented reality, AR), industrial control (industrial control), driverless (self driving), remote medical, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, drones, robots and other scenarios.
  • D2D device-to-device
  • V2X machine-to-machine/machine class Communication
  • M2M/MTC machine-to-machine/machine-type communications
  • M2M/MTC machine-to-machine/machine-type communications
  • Internet of Things Internet of Things
  • virtual reality virtual reality
  • VR augmented reality
  • AR augmented reality
  • industrial control industrial control
  • driverless self driving
  • the terminal device may be a handheld terminal in cellular communication, a communication device in D2D, an IoT device in MTC, a monitoring camera in smart transportation and smart city, or a communication device on a drone, etc.
  • Terminal equipment may sometimes be referred to as user equipment (UE), user terminal, user device, subscriber unit, subscriber station, terminal, access terminal, access station, UE station, remote station, mobile device, or wireless communication device, etc. wait.
  • the device used to realize the function of the terminal device may be a terminal device, or a device capable of supporting the terminal device to realize the function, such as a chip system or a combined device or component that can realize the function of the terminal device. Can be installed in terminal equipment.
  • a terminal device is taken as an example for description.
  • Resource refers to wireless resources, including time domain resources, frequency domain resources, or code domain resources.
  • Resource element One RE corresponds to one physical resource (a physical resource).
  • An RE is identified by (k, l), where k is a subcarrier index and l is a symbol index. That is, one RE corresponds to one time domain symbol in the time domain (hereinafter referred to as a symbol for short in the embodiments of the present application) and one subcarrier in the frequency domain.
  • RE is the resource unit with the smallest granularity.
  • a RB in the frequency domain consists of Consecutive subcarriers. in, is a positive integer. In 5G system, It is equal to 12, and can be other values when applied to other systems. In this embodiment of the present application, RBs are only defined from frequency domain resources and have nothing to do with time domain resources.
  • time-domain symbol which can also be called Orthogonal Frequency Division Multiplexing (OFDM) symbol. It should be noted that the time domain symbol can also be named in combination with other multiple access methods, which is not limited in this embodiment of the present application. For different subcarrier spacings, the time-domain symbol lengths may be different.
  • OFDM Orthogonal Frequency Division Multiplexing
  • Time slot A slot is composed of N symbols, and N is a positive integer. For example, for a normal cyclic prefix (NCP), N is equal to 14; for a long CP (extended cyclic prefix, ECP), N is equal to 12. When the solutions in the embodiments of the present application are applied to other systems, N may also be other values.
  • N may also be other values.
  • the length of a slot may be different, which is not limited in this embodiment of the present application. For example, when the subcarrier interval is 15 kHz and the CP is NCP, a slot is 1 ms (millisecond) and consists of 14 symbols.
  • terminal devices can realize downlink synchronization and obtain system information by receiving SSB.
  • a primary synchronization signal primary synchronization signal
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH physical broadcast channel
  • one SSB occupies 4 OFDM symbols (symbol 0 to symbol 3) in the time domain, and occupies 20 RBs in the frequency domain, that is, 240 subcarriers. Within these 20 RBs, subcarrier numbers are 0-239.
  • the PSS is located on the middle 127 subcarriers of symbol 0, and the SSS is located on the middle 127 subcarriers of symbol 2.
  • guard subcarriers are reserved on both sides of the PSS and SSS, and the guard subcarriers are not used to carry signals, that is, the signal on the guard subcarriers is 0.
  • the blank areas on the upper and lower sides of the SSS are protection subcarriers, which are 9 subcarriers and 8 subcarriers respectively; the blank areas on the upper and lower sides of the PSS are also protection subcarriers.
  • PBCH occupies all 240 subcarriers of symbol 1 and symbol 3, and occupies 96 subcarriers of symbol 2.
  • the 96 subcarriers are the first 48 subcarriers (subcarrier numbers are 0-47) and the last 48 subcarriers of all 240 subcarriers. Carrier (subcarrier numbers are 192 ⁇ 239).
  • PBCH occupies a total of 576 REs. However, 144 REs in the 576 REs are used to transmit a PBCH demodulation reference signal (demodulation reference signal, DMRS). That is, in a narrow sense, the PBCH actually occupies 432 REs among the 576 REs.
  • PBCH DMRS Physical layer cell identity
  • the bandwidth of SSB is shown in Table 2. It should be noted that a subcarrier number (subcarrier number) is also called a subcarrier index (subcarrier index), and a symbol number is also called a symbol index.
  • the processing or generation process of PBCH includes cyclic redundancy check (CRC, Cyclic Redundancy Check) addition, channel coding (channel coding), rate matching (rate matching), scrambling (scrambling), modulation (modulation) and mapping to Processes such as mapping to physical resources are shown in Figure 7.
  • the rate matching refers to matching the coded bits output by the channel coding with the physical layer resources actually transmitted.
  • the processing of rate matching is related to the coding method.
  • PBCH adopts polar code, and the rate matching of polar code generally includes sub-block interleaving, bit selection, and coded bit interleaving. of coded bits).
  • the rate matching output bit sequence length E is 864.
  • the number of REs used to transmit PBCH is 432
  • the mapping to the physical resource is to map the modulated modulation symbol to the physical resource.
  • the modulation symbols are sequentially mapped to 432 REs except those occupied by PBCH DMRS.
  • the mapping is performed according to the order in which the subcarrier index in the frequency domain of the RE increases first, and then the symbol index in the time domain of the RE increases. That is, the mapping is first performed in the frequency domain dimension, followed by the mapping in the time domain dimension, and both are mapped in the order of increasing index values of the respective dimensions.
  • a synchronization burst set refers to a set of SSBs included in one beam sweep (beam sweep).
  • the period of the SS burst set is equivalent to the period of the SSB corresponding to a specific beam, and can be configured as 5ms (milliseconds), 10ms, 20ms, 40ms, 80ms or 160ms, etc.
  • 20ms is the default period, that is, the period assumed when the UE performs initial cell search. After entering the RRC connected state (RRC_CONNECTED), other cycles can be configured.
  • L max 4 or 8 or 64.
  • each SS burst set is always located within a time interval of 5 ms, which is the first half or the second half of a 10 ms frame (frame). As shown in FIG. 3 , the period of the SS burst set is 20 ms, and one SS burst set includes L SSBs.
  • the PBCH carries the Master Information Block (MIB).
  • the MIB update period is 80ms, that is, the MIB information carried on all PBCHs within the 80ms period is the same.
  • the SSB with the same index value is repeatedly sent four times within the MIB period of 80 ms.
  • the UE can perform combined detection on the received SSB data with the same index value, so as to improve the demodulation performance of the PBCH.
  • the number of information bits carried by the existing PBCH is 32, that is, the PBCH payload size (payload size) is 32 bits (bit).
  • the 32-bit information includes 24-bit high-layer information and 8-bit physical layer information (also referred to as L1 information).
  • the 24-bit high-level information includes information in the MIB and 1-bit selection information.
  • 1-bit choice (choice) information indicates whether it is an extended message.
  • Table 3 is a schematic table of multiple bits (fields) and function descriptions included in the MIB.
  • the private network can realize network signal coverage in a specific area, and provide communication services for specific users in the links of organization, command, management, production, scheduling, etc.
  • the private network can be applied to railway mobile radio networks, smart grids, public protection and disaster relief ( public protection and disaster relief, PPDR) and other scenarios.
  • the system bandwidth of the private network is much smaller than the existing NR system bandwidth.
  • the system bandwidth of the private network may be 3 MHz to 5 MHz.
  • Table 1 when the subcarrier spacing is 15KHz, the PBCH bandwidth is greater than 3MHz; when the subcarrier spacing is 30KHz, the PBCH bandwidth is greater than 5MHz. Therefore, existing SSBs may not be able to transmit in bandwidth-constrained systems like private networks.
  • narrowband NR narrowband NR
  • NB-NR narrowband NR
  • the main application scenarios of NB-NR are some private networks, so coexistence with existing NR networks and existing UEs may not be considered, such as Rel-15 eMBB.
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable low-latency communication
  • REDCAP reduced capability NR device
  • the UE supporting NB-NR may be a broadband UE or a narrowband UE.
  • the maximum bandwidth supported by the narrowband UE is smaller than the maximum bandwidth supported by the broadband UE, for example, the narrowband UE supports a maximum bandwidth of 5 MHz, and the broadband UE supports a maximum bandwidth of 100 MHz.
  • NB-NR may be applied to some other non-private network scenarios, and this embodiment of the present application does not limit the application scenarios of NB-NR.
  • the method provided by the embodiment of the present application will be described below with reference to the accompanying drawings. It can be understood that in the method embodiments described below, only network devices and terminal devices are used as examples for illustration, and the network devices mentioned in the method embodiments can also be replaced by chips configured in network devices Execution, the terminal device may also be executed by a chip configured in the terminal device. Specifically, the terminal device and the network device may be in various forms mentioned above.
  • FIG. 4A to 4D are schematic diagrams of the structure of the SSB provided by the embodiment of the present application.
  • the PBCH mapping resource provided by the embodiment of the present application will be described below with reference to FIG. 4A to FIG. 4D .
  • the first physical resource is the physical resource to which the first PBCH and the first PBCH DMRS are mapped. That is, the first physical resource is the physical resource occupied by the first PBCH and the first PBCH DMRS.
  • One RE corresponds to one physical resource. Therefore, the first physical resource is the RE to which the first PBCH and the first PBCH DMRS are mapped, or in other words, the first physical resource is the RE occupied by the first PBCH and the first PBCH DMRS.
  • the first PBCH is the PBCH in the first SSB.
  • the first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • X is less than or equal to 216.
  • X is less than or equal to 216.
  • X is greater than or equal to 180 and less than or equal to 216.
  • X is less than or equal to 150.
  • the subcarrier spacing is 30 kHz
  • X is less than or equal to 150, or, X is greater than or equal to 144 and less than or equal to 150.
  • X is greater than 127.
  • the number of subcarriers occupied by the existing PSS or SSS in the frequency domain is 127, so the existing synchronization sequence can be used to ensure the synchronization performance.
  • the same synchronization detection algorithm is used to reduce implementation complexity.
  • X is 180.
  • the frequency domain bandwidth of the first SSB is 2.7 MHz, which is applicable to a system bandwidth not greater than 3.6 MHz. If the system bandwidth is 3MHz, 0.3MHz can be reserved on both sides of the first SSB as a guard band. At this time, the guard band occupies 10% of the system bandwidth, and the resource utilization rate is high.
  • X is 192.
  • the frequency domain bandwidth of the first SSB is 2.88 MHz, which is applicable to a system bandwidth not greater than 3.6 MHz. If the system bandwidth is 3MHz, 0.12MHz may be reserved on both sides of the first SSB as a guard frequency band. If the system bandwidth is 3.6 MHz, 0.72 MHz can be reserved on both sides of the first SSB as a guard frequency band.
  • X is 216.
  • the frequency domain bandwidth of the first SSB is 3.24 MHz, which is applicable to a system bandwidth not greater than 3.6 MHz. If the system bandwidth is 3.6 MHz, 0.36 MHz can be reserved on both sides of the first SSB as a guard frequency band. At this time, the guard band occupies 10% of the system bandwidth, and the resource utilization rate is high.
  • X is 144.
  • the frequency domain bandwidth of the first SSB is 4.32 MHz, which is applicable to a system bandwidth not greater than 7.2 MHz. If the system bandwidth is 5MHz, 0.68MHz may be reserved on both sides of the first SSB as a guard frequency band.
  • X is 150.
  • the frequency domain bandwidth of the first SSB is 4.5MHz, which is applicable to the system bandwidth not greater than 7.2MHz. If the system bandwidth is 5 MHz, 0.5 MHz can be reserved on both sides of the first SSB as a guard band. At this time, the guard band occupies 10% of the system bandwidth, and the resource utilization rate is high.
  • the first physical resource includes all REs on the second symbol and the fourth symbol, and also includes Y REs on the third symbol, where Y is a positive integer less than X .
  • the Y REs are located on both sides of the X subcarriers in the frequency domain. It should be noted that the Y REs may be evenly distributed on both sides of the X subcarriers, or may be unevenly distributed on both sides of the X subcarriers.
  • the Y REs are located on the front Y subcarriers or the last Y subcarriers of the X subcarriers in the frequency domain. As shown in the right figure of FIG.
  • X is 180, Y is 36, and on the third symbol, the subcarrier numbers of the Y REs are 0-17 and 162-179.
  • the Y REs can be evenly distributed on both sides of the X subcarriers, as shown in the right figure of FIG. 4A; or, the Y REs can also be unevenly distributed on both sides of the subcarriers, for example, X is 216, Y is 72, and on the third symbol, the subcarrier numbers of the Y REs are 0-47 and 192-215.
  • the Y REs are located on the first Y subcarriers of the X subcarriers in the frequency domain. As shown in the right figure of FIG.
  • X is 192, Y is 48, and on the third symbol, the subcarrier numbers of the Y REs are 0-47.
  • the Y REs are located on the last Y subcarriers of the X subcarriers in the frequency domain.
  • X is 192, Y is 48, and on the third symbol, the subcarrier numbers of the Y REs are 144-191.
  • the first physical resource only includes all REs on the second symbol and the fourth symbol, that is, the first physical resource does not include the REs on the third symbol.
  • the first PBCH is not mapped to the third symbol, that is, Y is 0.
  • the first physical resource is determined according to the first frequency domain pattern.
  • the first frequency domain pattern indicates frequency domain resources occupied by the first PBCH, or in other words, the first frequency domain pattern indicates subcarriers occupied by the first PBCH.
  • the first frequency domain pattern indicates frequency domain resources occupied by the first PBCH and the first PBCH DMRS in the first SSB.
  • the network device maps the first PBCH and the first PBCH DMRS to the first physical resource according to the first frequency domain pattern.
  • the UE determines the first physical resource according to the first frequency domain pattern.
  • the first frequency-domain pattern is a part of the patterns included in the second frequency-domain pattern, that is, the first frequency-domain pattern is the same as a part of the patterns included in the second frequency-domain pattern.
  • the first frequency domain pattern is a frequency domain resource pattern in the first resource region
  • the second frequency domain pattern is a frequency domain resource pattern in the second resource region.
  • the first resource area is a part of the second resource area, that is, the first resource area is a sub-area of the second resource area.
  • the first frequency domain pattern is a pattern of the second frequency domain pattern in the first resource region.
  • the resource regions in the "first resource region” and “second resource region” are not real physical resource regions, but relative resource regions; or in other words, resource regions are virtual resources for defining frequency domain patterns scope. That is, the frequency domain pattern is a frequency domain pattern within a certain resource range.
  • the second resource region is the above-mentioned resource range occupied by the existing SSB, that is, the second resource region occupies 4 consecutive symbols in the time domain and 240 consecutive subcarriers in the frequency domain.
  • the second frequency domain pattern is a pattern of frequency domain resources occupied by the existing PBCH and PBCH DMRS in the existing SSB. As shown in Figure 2, Figure 4A, Figure 4B, Figure 4C and Figure 4D, the second frequency domain pattern includes: on the second symbol and the fourth symbol in the 4 symbols, the frequency domain resources are the 240 sub carrier; on the third symbol in the 4 symbols, the frequency domain resources are 96 subcarriers in the 240 subcarriers. Wherein, the 96 subcarriers are the first 48 subcarriers and the last 48 subcarriers in the 240 subcarriers.
  • the first resource region is a resource range occupied by the first SSB.
  • the first resource region occupies 4 consecutive symbols in the time domain and X consecutive subcarriers in the frequency domain, where X is a positive integer less than 240.
  • X is a positive integer less than 240.
  • the first frequency domain pattern is a pattern of frequency domain resources occupied by the first PBCH in the first SSB.
  • X is greater than 127. Because the number of subcarriers occupied by the existing PSS or SSS in the frequency domain is 127, the existing synchronization sequence can be used in this way. Especially for the puncturing method (described in S630), it is necessary to reserve all REs of the PSS and SSS as much as possible, otherwise the time and frequency synchronization performance of the UE will be affected after the PSS and SSS are punctured.
  • the first resource region and the second resource region occupy the same 4 symbols; in the frequency domain, the X consecutive subcarriers occupied by the first resource region are 240 subcarriers occupied by the second resource region The middle X consecutive subcarriers in the contiguous subcarriers.
  • the first frequency domain pattern includes: on the second and fourth symbols of the 4 symbols, the frequency domain resources are the X subcarriers; on the third symbol of the 4 symbols, the frequency domain resources Y subcarriers in the 96 subcarriers, Y is a positive integer less than 96. As shown in the left figure of FIG.
  • the black box is the first resource region, and the black box occupies 4 symbols in the time domain and 180 subcarriers in the middle in the frequency domain.
  • the first frequency domain pattern includes: on the second symbol and the fourth symbol in the 4 symbols, the frequency domain resource is the 180 subcarriers; on the third symbol in the 4 symbols, the frequency domain resource are middle 36 subcarriers in the 96 subcarriers, where the 36 subcarriers are the first 18 subcarriers and the last 18 subcarriers in the X subcarriers.
  • the black box is the first resource region, and the black box occupies 4 symbols in the time domain and 144 subcarriers in the middle in the frequency domain.
  • the first frequency domain pattern only includes: on the second symbol and the fourth symbol of the 4 symbols, frequency domain resources are the 144 subcarriers.
  • the first resource region and the second resource region occupy the same 4 symbols; in the frequency domain, the X consecutive subcarriers occupied by the first resource region are 240 subcarriers occupied by the second resource region The first X consecutive subcarriers or the last X consecutive subcarriers in the consecutive subcarriers.
  • the black box is the first resource region, and the black box occupies 4 symbols in the time domain and occupies the first 192 subcarriers in the frequency domain.
  • the first frequency domain pattern includes: on the second symbol and the fourth symbol in the 4 symbols, the frequency domain resource is the 192 subcarriers; on the third symbol in the 4 symbols, the frequency domain resource are the first 48 subcarriers in the 96 subcarriers.
  • the black box is the first resource region, and the black box occupies 4 symbols in the time domain and occupies the last 192 subcarriers in the frequency domain.
  • the first frequency domain pattern includes: on the second symbol and the fourth symbol in the 4 symbols, the frequency domain resource is the 192 subcarriers; on the third symbol in the 4 symbols, the frequency domain resource are the last 48 subcarriers in the 96 subcarriers.
  • the first physical resource is determined according to the first RE pattern.
  • the network device maps the first PBCH to the first physical resource according to the first RE pattern.
  • the UE determines the first physical resource according to the first RE pattern.
  • the first RE pattern is a part of the second RE pattern.
  • the first RE pattern is a resource unit pattern in the first resource region, and the second RE pattern is a resource unit pattern in the second resource region.
  • the first resource area is a sub-area of the second resource area, and correspondingly, the first frequency domain pattern is a pattern of the second frequency domain pattern in the first resource area.
  • the first resource region and the second resource region occupy the same 4 symbols; in the frequency domain, the X consecutive subcarriers occupied by the first resource region are 240 subcarriers occupied by the second resource region Among the consecutive subcarriers, the middle X consecutive subcarriers, the first X consecutive subcarriers, or, the last X consecutive subcarriers.
  • REs in the second RE pattern include: all 240 REs on the second symbol of the 4 symbols, all 240 REs on the fourth symbol of the 4 symbols, all 240 REs on the fourth symbol of the 4 symbols, 96 REs on the third symbol in , where the 96 REs are located in the first 48 subcarriers and the last 48 subcarriers of the 240 subcarriers in the frequency domain.
  • the REs in the first RE pattern include: the middle X REs, the first X REs, or, the last X REs on the second symbol of the 4 symbols; the fourth symbol of the 4 symbols the middle X REs, the first X REs, or, the last X REs on the 4 symbols; the middle Y REs, the first Y REs of the 96 REs on the third symbol of the 4 symbols, or,
  • Y is a positive integer less than 96.
  • different resource areas may be configured for different cells. For example, the SSB of cell A is located in the first X consecutive subcarriers in the frequency domain, and the SSB of cell B is located in the last X consecutive subcarriers in the frequency domain.
  • the second physical resource is a physical resource to which the second PBCH and the second PBCH DMRS are mapped. That is, the second physical resource is the physical resource occupied by the second PBCH and the second PBCH DMRS.
  • One RE corresponds to one physical resource, therefore, the second physical resource is the RE to which the second PBCH and the second PBCH DMRS are mapped, or in other words, the second physical resource is the RE occupied by the second PBCH and the second PBCH DMRS.
  • the second PBCH is the PBCH in the second SSB.
  • the second SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the second physical resource and the first physical resource are located in different time domain resources. That is, the first PBCH and the second PBCH are located in different time domain resources, and the first SSB and the second SSB are located in different time domain resources. As shown in Figures 5A, 5B and 5C.
  • the first SSB and the second SSB may be located in different SSB bursts.
  • the first SSB and the second SSB are respectively located in two consecutive SSB bursts.
  • frequency domain resources occupied by the second PBCH and the first PBCH are the same. That is, the second PBCH is also determined according to the first frequency domain pattern. As shown in Figures 5A and 5B, the frequency domain resources occupied by the second PBCH in the second SSB are the same as the frequency domain resources occupied by the first PBCH in the first SSB, but the 3 symbols occupied by the second PBCH are the same as those occupied by the first PBCH The 3 symbols occupied are not the same.
  • the frequency domain resources occupied by the first SSB and the second SSB are the same and have the same structure.
  • the time-frequency domain resources of the first PSS, the first SSS and the first PBCH in the first SSB are the same as the time-frequency domain resources of the second PSS, the second SSS and the second PBCH in the second SSB , that is, the structures of the first SSB and the second SSB are the same.
  • the frequency domain resources occupied by the first SSB and the second SSB are the same, but have different structures.
  • the time domain resources of the first PSS and the first SSS in the first SSB are different from the time domain resources of the second PSS and the second SSS in the second SSB, that is, the first SSB and the second The structure of SSB is different.
  • the network device may explicitly or implicitly notify the PBCH mapping manner.
  • the PBCH resource pattern can be indicated by the positions of the PSS and the SSS. Specifically, the relative position of the PSS and the SSS can be used to indicate the mapping manner of PBCH transmission.
  • the relative position symbol 0 in which the PSS is located in the SSB and the relative position symbol 2 in which the SSS is located in the SSB indicates resource mapping A (e.g., subcarriers are mapped from large to small), and the relative position symbol 2 in which the PSS is located in the SSB And the relative position symbol 0 where the SSS is located in SSB indicates resource mapping B (for example, subcarriers are mapped from small to large).
  • the resource pattern sent by the PBCH may also be indicated by the sequence of the PSS and/or SSS.
  • frequency domain resources occupied by the second PBCH and the first PBCH are not completely the same.
  • the second PBCH is determined according to the third frequency domain pattern or the third RE pattern.
  • the third frequency domain pattern or the third RE pattern is a frequency domain resource pattern or resource unit pattern in the third resource region, and the third frequency domain pattern or the third RE pattern is the second frequency domain pattern or the second RE pattern in the The pattern within the third resource region.
  • the third frequency domain pattern/third RE pattern is not exactly the same as the second frequency domain pattern/third RE pattern.
  • the second resource region occupies 4 consecutive symbols in the time domain and 240 consecutive subcarriers in the frequency domain
  • the first resource region occupies the 4 consecutive symbols in the time domain and 240 consecutive subcarriers in the frequency domain.
  • the third resource region occupies the 4 consecutive symbols in the time domain and occupies the last X subcarriers in the 240 consecutive subcarriers in the frequency domain.
  • the second resource region occupies 4 consecutive symbols in the time domain and 240 consecutive subcarriers in the frequency domain
  • the first resource region occupies the 4 consecutive symbols in the time domain and occupies 240 consecutive subcarriers in the frequency domain.
  • the last X subcarriers in the 240 consecutive subcarriers the third resource region occupies the 4 consecutive symbols in the time domain and the first X subcarriers in the 240 consecutive subcarriers in the frequency domain.
  • the frequency domain resources occupied by the second PBCH on the third symbol in the second SSB are different from the frequency domain resources occupied by the first PBCH on the third symbol in the first SSB, and the first PBCH
  • the 3 symbols occupied by the second PBCH are different from the 3 symbols occupied by the first PBCH.
  • the SSBs between adjacent cells cannot reduce mutual interference through frequency division.
  • the interference can be reduced by performing time division of SSBs between adjacent cells.
  • the SSB bursts of multiple adjacent cells may be located in different half frames, for example, the SSB burst of cell A is located in the first half frame of the system frame, and the SSB burst of cell B is located in the second half frame of the system frame.
  • Fig. 6 is a schematic flowchart of a communication method provided by an embodiment of the present application. Each step shown in FIG. 6 will be described below. It should be noted that the steps indicated by dotted lines in FIG. 6 are optional, and will not be described in detail below.
  • the network device generates system information carried by the first PBCH.
  • the system information carried by the first PBCH may also be referred to as the first PBCH load for short. That is, the network device generates the first PBCH payload.
  • the number of bits of the system information is M bits, that is, the size of the first PBCH payload is M bits, where M is less than 32.
  • the M-bit information includes the MIB.
  • the reduction of physical resources used to transmit the PBCH will lead to a decrease in the transmission performance of the PBCH and affect the access of the UE to the cell. Therefore, compared with the 32-bit existing PBCH load size, the first PBCH load becomes smaller, thereby reducing the code rate, which is beneficial to improving the performance of the first PBCH.
  • the MIB does not contain "subCarrierSpacingCommon" information.
  • the subcarrier spacing between the PDCCH for scheduling SIB1 and the PDSCH for carrying SIB1 is fixed at 15 kHz. Since the private network scenario mainly considers frequency division duplex (FDD) and 15kHz subcarrier spacing scenarios, the subcarrier spacing is fixed at 15kHz, which has little impact on system configuration.
  • the MIB does not contain "dmrs-TypeA-Position" information.
  • the DMRS symbol position can be fixed as symbol 3 when the Type A PDSCH is mapped.
  • the bandwidth of the narrowband system is relatively small, and the number of symbols in the time domain of the control resource set #0 (control resource set #0, CORESET #0) can be fixed at 3 to ensure sufficient resources to transmit the PDCCH, thereby ensuring the transmission performance of the PDCCH.
  • the DMRS symbol position can be fixed at symbol 3 during Type A PDSCH mapping.
  • the number of bits of the "pdcch-ConfigSIB1" information included in the MIB is less than 8, or, the MIB does not include the "pdcch-ConfigSIB1" information.
  • some configurations of CORESET#0 and/or Type0-PDCCH CSS set can be predefined, for example, the number of RBs is predefined as the system bandwidth size, the number of symbols is predefined as 3, and the offset between SSB (RBs) is predefined as 0, or the multiplexing pattern of SSB and CORESET is predefined as 1.
  • some configuration parameters of the Type0-PDCCH CSS set can also be predefined, and the pdcch-ConfigSIB1 indication field can no longer be included in the MIB.
  • the number of bits of the physical layer information included in the system information is less than 8.
  • the existing PBCH payload contains 8 additional timing related bits.
  • SSB bursts between different cells may be located in different half-frames.
  • the half-frame number where the SSB burst is located is related to the cell ID (such as PCI).
  • the half-frame number where the SSB burst is located Cell ID mod X, where mod is a modulo operation, and X is a positive integer.
  • X may be the number of fields within 20ms.
  • the number of additional timing-related bits added by the PBCH physical layer may be less than 8, for example, 5.
  • the network device encodes the system information carried by the first PBCH.
  • the coded bits of the first PBCH are bits obtained after system information is coded.
  • the coding of the first PBCH includes adding a cyclic redundancy check (CRC), channel coding (channel coding) and rate matching (Rate matching) operations.
  • CRC adding, channel coding and rate matching can refer to 7.1.3, 7.1.4 and 7.1.5 in TS38.212 respectively.
  • the network device encodes the system information carried by the first PBCH according to the second frequency domain pattern or the second RE pattern. That is, the coding bits of the first PBCH are determined according to the second frequency domain pattern or the second RE pattern.
  • the second frequency domain pattern or the second RE pattern is the existing SSB pattern shown in Table 1 and Figure 2, and the number of REs in the second resource region is determined to be 576 according to the second frequency domain pattern or the second RE pattern,
  • the number of REs used to transmit the PBCH is 432
  • the network device maps the first PBCH to the first physical resource.
  • the first PBCH DMRS is a reference signal for demodulation of the first PBCH. Therefore, it also includes: the network device maps the first PBCH DMRS to the first physical resource. That is, S630 includes: the network device maps the first PBCH to the physical resource used to transmit the first PBCH in the first physical resource, or in other words, the network device maps the modulation symbol of the first PBCH to the first physical resource for The physical resource for transmitting the first PBCH; the network device maps the first PBCH DMRS to the physical resource used to transmit the first PBCH DMRS in the first physical resource, or in other words, the network device maps the first PBCH DMRS sequence to the first physical resource The physical resources used to transmit the first PBCH DMRS.
  • the modulation symbol of the first PBCH refers to the modulation symbol obtained after the system information/first PBCH load carried by the first PBCH is subjected to channel coding and modulation.
  • Step S630 belongs to a step in the network device generating the first PBCH and the first PBCH DMRS.
  • the network device generating the first PBCH includes: the network device adds CRC to the first PBCH load, channel coding, rate matching, scrambling, modulation, physical resource mapping (that is, the network device adds the first PBCH mapped to physical resources for transmitting the first PBCH), OFDM baseband signal generation processing, and the like.
  • the baseband signal obtained after processing represents the first PBCH.
  • the network device generates the first PBCH DMRS includes: the first PBCH DMRS sequence generation, physical resource mapping (that is, the network device maps the first PBCH DMRS to physical resources for transmitting the first PBCH DMRS), OFDM baseband signal generation processing etc.
  • the baseband signal obtained after processing represents the first PBCH DMRS.
  • S630 includes: the network device determines the first physical resource according to a predefined rule or a pre-stored rule; and then maps the first PBCH and the first PBCH DMRS to the first physical resource.
  • a pre-defined rule or a pre-stored rule in the network device is used to indicate the first physical resource.
  • the first physical resource is determined according to the first frequency domain pattern or the first RE pattern.
  • the network device maps the first PBCH and the first PBCH DMRS to the first physical resource according to the first frequency domain pattern or the first RE pattern.
  • S630 includes: the network device determines the first physical resource according to the frequency domain resource in the first frequency domain pattern or the RE in the first RE pattern; and then maps the first PBCH and the first PBCH DMRS to the first physical resource.
  • the first frequency domain pattern refer to the above description, which will not be repeated here.
  • S630 is combined with the first possible implementation manner in S620, that is, both the number of coded bits of the first PBCH and the first physical resource are determined according to the first frequency domain pattern or the first RE pattern. At this time, the rate matching of the first PBCH in the narrowband system is performed according to the first physical resource, which can solve the problem that the existing PBCH cannot be transmitted in the narrowband.
  • S630 combines the second possible implementation in S620, that is, the number of coded bits of the first PBCH is determined according to the second frequency domain pattern or the second RE pattern, but the first physical resource is determined according to the first frequency domain pattern or determined by the first RE pattern.
  • the first PBCH in the narrowband system performs rate matching according to the physical resources of the existing PBCH, but is mapped to the first physical resource, because the first physical resource is less than the physical resources of the existing PBCH, so the first PBCH cannot be transmitted
  • a coded bit of the PBCH is deleted, that is, a puncture method is adopted. As shown in Fig. 8A, the white area will be punched, that is, not sent.
  • the position of the deleted PBCH RE is fixed, for example, only the PBCH RE with the high bit of the RE index value is deleted, or only the PBCH RE with the low bit of the RE index value is deleted.
  • the adjustment performance is greatly lost, which affects the UE's access to the cell. Therefore, it needs to be demodulated together with the second PBCH.
  • the UE determines a first physical resource.
  • the UE determines the first physical resource according to a predefined rule or a pre-stored rule.
  • a pre-defined rule or a pre-stored rule in the UE is used to indicate the first physical resource.
  • the first physical resource is determined according to the first frequency domain pattern or the first RE pattern.
  • the UE determines the first physical resource according to the first frequency domain pattern or the first RE pattern.
  • For the first frequency domain pattern refer to the above description, which will not be repeated here.
  • S640 includes: the UE determines physical resources used for transmitting the first PBCH in the first physical resources and physical resources used for transmitting the first PBCH DMRS in the first physical resources.
  • the first PBCH DMRS occupies one subcarrier in every K subcarriers in the frequency domain.
  • K is a positive integer, for example, K is 4.
  • the first PBCH occupies subcarriers in the first physical resource except the first PBCH DMRS in the frequency domain.
  • the network device sends the first PBCH.
  • the UE receives the first PBCH.
  • the first PBCH is located on the first physical resource.
  • the network device sends the first PBCH and the first PBCH DMRS on the first physical resource.
  • the UE receives the first PBCH and the first PBCH DMRS on the first physical resource.
  • the UE acquires system information carried by the first PBCH.
  • S660 includes: the UE performs inverse OFDM operation, demapping, demodulation, descrambling and decoding on the first PBCH to obtain system information.
  • the UE performs inverse OFDM operation, demapping, demodulation, descrambling and decoding on the first PBCH to obtain system information.
  • the UE decodes or decodes the received first PBCH data, since the number of coded bits of the first PBCH is determined according to the first frequency domain pattern or The first RE pattern is determined, so all coded bits of the first PBCH can be received, and the UE can decode the received first PBCH data. If the decoding is successful, the bits before the PBCH code can be obtained, and then in The system information is obtained from the obtained pre-encoding bits.
  • the UE when the UE decodes or decodes the received first PBCH data, since the number of coded bits of the first PBCH is determined according to the second frequency domain pattern Or the second RE pattern is determined, so only the PBCH coded bits transmitted on the first physical resource can be received, but the PBCH coded bits transmitted on resources other than the first physical resource cannot be received. For this part of the coded bits,
  • the likelihood information can be regarded as 0, so the UE can only decode according to the first received PBCH data, if the decoding is successful, it can obtain the bits before PBCH encoding , and then obtain the system information from the obtained pre-encoded bits.
  • the UE completes the cell search and synchronization process by correctly receiving the system information carried in the first PBCH. Specifically, by receiving the MIB, the UE obtains the configuration information required to interpret the system information block type 1 (system information block Type 1, SIB1) message included in the MIB.
  • the configuration information may include the control resource set corresponding to the SIB1 ( control resource set, Coreset) and search space (search space, SS), etc.
  • the SIB1 is obtained according to the configuration information corresponding to the SIB1.
  • the SIB1 may include the configuration information required by the terminal device to access the system, and the UE may implement system access, cell selection, and uplink synchronization according to the SIB1.
  • the existing PBCH may not be able to transmit.
  • the first PBCH occupies less than 240 subcarriers in the frequency domain, which can enable PBCH transmission in a narrowband system.
  • the first frequency domain pattern or the first RE pattern is a part of the second frequency domain pattern or the second RE pattern, that is, multiple different patterns are not introduced for broadband and narrowband systems. Therefore, the system can adaptively configure appropriate patterns according to the system bandwidth, and has good compatibility; in addition, the complexity is relatively low for terminal devices that have both narrowband access and broadband access capabilities. Further, the reduced load of the first PBCH can reduce the code rate, which is beneficial to improve the performance of the first PBCH.
  • FIG. 9 is a schematic flowchart of a communication method provided by an embodiment of the present application. Each step shown in FIG. 9 will be described below. It should be noted that the steps indicated by dotted lines in FIG. 9 are optional, and will not be described in detail below.
  • the first PBCH and the second PBCH carry the same system information, therefore, the UE can improve the probability of successfully receiving the system information by combining the first PBCH and the second PBCH.
  • the network device generates system information.
  • the system information is the system information carried by the first PBCH. For details, refer to the description in S610, which will not be repeated here.
  • the system information carried by the first PBCH and the second PBCH is the same. That is, the system information is also the system information carried by the second PBCH.
  • the network device encodes the system information.
  • the coded bits of the first PBCH are bits obtained after system information is coded.
  • the encoded bits of the second PBCH are bits obtained after encoding the system information.
  • the encoding bits of the first PBCH and the second PBCH are the same, that is, the encoding manners of the first PBCH and the second PBCH are the same.
  • the numbers of coded bits of the first PBCH and the second PBCH are both determined according to the first frequency domain pattern or the first RE pattern.
  • the numbers of coded bits of the first PBCH and the second PBCH are both determined according to the second frequency domain pattern or the second RE pattern.
  • the second possible implementation manner in S620 which will not be repeated here.
  • the network device maps the first PBCH to the first physical resource.
  • the UE determines a first physical resource.
  • the network device sends the first PBCH.
  • the UE receives the first PBCH.
  • the first PBCH is located on the first physical resource.
  • the network device maps the second PBCH to the second physical resource.
  • the second PBCH DMRS is a reference signal for demodulation of the second PBCH. Therefore, it also includes: the network device maps the second PBCH DMRS to the second physical resource. That is, S630 includes: the network device maps the second PBCH to physical resources used to transmit the second PBCH in the second physical resource; the network device maps the second PBCH DMRS to the second physical resource for transmitting the second PBCH DMRS physical resources.
  • Step S960 belongs to a step in the network device generating the second PBCH and the second PBCH DMRS.
  • Step S630 replace “first PBCH” with “second PBCH”, and replace “first PBCH DMRS” with “second PBCH DMRS", which will not be repeated here.
  • Method 1 The number of coded bits of the first PBCH and the second PBCH is determined according to the first frequency domain pattern or the first RE pattern, and the first physical resource and the second physical resource are both determined according to the first frequency domain pattern or the first RE pattern. A RE pattern is determined.
  • rate matching between the first PBCH and the second PBCH in the narrowband system is enough, which can solve the problem that the existing PBCH cannot be transmitted in the narrowband.
  • the UE combines the first PBCH and the second PBCH, which can improve the transmission performance of the system information and increase the probability of the UE accessing the cell.
  • Method 2 The number of coded bits of the first PBCH and the second PBCH is determined according to the second frequency domain pattern or the second RE pattern, but both the first physical resource and the second physical resource are determined according to the first frequency domain pattern or the second RE pattern. A RE pattern is determined.
  • the first and second PBCH in the narrowband system perform rate matching according to the physical resources of the existing PBCH, but are mapped to the first and second physical resources respectively, because the first and second physical resources are less than the existing PBCH
  • the physical resources of the PBCH, so the coded bits of the first PBCH and the coded bits of the second PBCH that cannot be transmitted will be deleted, that is, a punching method is used.
  • the position of the deleted RE in the first PBCH and the second PBCH is the same, which will cause the same coded bits to be deleted fixedly, which will cause a large loss in the demodulation performance of the PBCH and affect the UE's access to the cell.
  • mode 3 and mode 4 are introduced.
  • Method 3 The number of coded bits of the first PBCH and the second PBCH is determined according to the second frequency domain pattern or the second RE pattern, but the first physical resource is determined according to the first frequency domain pattern or the first RE pattern, The second physical resource is determined according to the third frequency domain pattern or the third RE pattern.
  • the third frequency domain pattern or the third RE pattern refer to the foregoing description, and details are not repeated here.
  • FIG. 8C the positions of the deleted REs in the first PBCH and the second PBCH are different, that is, the coding bits transmitted by the first PBCH and the second PBCH are different.
  • the UE combines the first PBCH and the second PBCH to obtain greater coding gain, thereby improving the transmission performance of system information and increasing the probability of UE accessing a cell.
  • Mode 4 The number of coded bits of the first PBCH and the second PBCH is determined according to the second frequency domain pattern or the second RE pattern, and the first physical resource and the second physical resource are both determined according to the first frequency domain pattern or the first RE pattern. RE pattern determined.
  • the first PBCH is mapped in order of subcarrier indexes from small to large
  • the second PBCH is mapped in order of subcarrier indexes from large to small
  • the second PBCH is mapped in order of subcarrier indexes from small to large
  • the first PBCH is mapped in descending order of subcarrier indices.
  • the network device maps the first PBCH to the physical resource used to transmit the first PBCH in the first physical resource according to the order of subcarrier index from small to large, and the network device maps the second PBCH according to the subcarrier index from large to small sequentially mapped to physical resources used for transmitting the second PBCH in the second physical resources; and vice versa.
  • the coding bits transmitted by the first PBCH and the second PBCH are different.
  • the UE combines the first PBCH and the second PBCH to obtain greater coding gain, thereby improving the transmission performance of system information and increasing the probability of UE accessing a cell.
  • the UE determines a second physical resource.
  • the network device sends the second PBCH.
  • the UE receives the second PBCH.
  • the second PBCH is located on the second physical resource.
  • the UE acquires system information.
  • the UE acquires system information according to the first PBCH and the second PBCH.
  • the UE performs combined detection on the received first PBCH and the second PBCH to obtain system information.
  • the UE demodulates the received first PBCH and the second PBCH separately, obtains the likelihood information of the coded bits carried by the two PBCHs respectively, and before decoding, carries the obtained two PBCHs
  • the likelihood information of the coded bits is combined, and then decoded according to the likelihood information of the combined PBCH coded bits. If the decoding is correct, the pre-coded bits can be obtained, and then the corresponding System information, wherein the encoding and decoding refer to channel encoding and channel decoding respectively.
  • the existing PBCH may not be able to transmit.
  • the subcarriers occupied by the first PBCH and the second PBCH in the frequency domain are less than 240, which can enable PBCH transmission in a narrowband system.
  • the UE combines the first PBCH and the second PBCH, which can improve the transmission performance of system information and increase the success probability of accessing the cell. Further, the number of system information bits is reduced, which can reduce the code rate, which is beneficial to improve the performance of the first PBCH.
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the order of execution of the processes should be determined by their functions and internal logic.
  • the various numerical numbers or serial numbers involved in the above-mentioned various processes are only for convenience of description, and shall not constitute any limitation to the implementation process of the embodiment of the present application.
  • S640 and S630/S620/S610 may be performed simultaneously, or S640 may be performed before or after S630/S620/S610.
  • S970 and S960 may be performed simultaneously, or S970 or S960 may be the preceding step.
  • FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application. It should be noted that the part indicated by the dotted box in FIG. 10 is optional, and will not be described in detail below.
  • the communication device 3000 includes one or more processors 3100 .
  • the processor 3100 can be used for internal processing of the device to realize certain control processing functions.
  • processor 3100 includes instructions 3110 .
  • processor 3100 may store data.
  • the processor 3100 may be a general-purpose processor or a special-purpose processor.
  • the communication device 3000 includes at least one of the following processors: a central processing unit (central processing unit, CPU), a digital signal processor (digital signal processor, DSP), a baseband processor, a modem processor, a transceiver processor , application processor, image signal processor, video codec processor, controller, microprocessor, microcontroller, system-on-a-chip (SoC), and/or, neural network processor, etc.
  • different processors may be separate devices, may be located in different physical locations, and may be located on different integrated circuits.
  • different processors may be integrated within one or more processors, eg, on one or more integrated circuits.
  • the communication device 3000 includes one or more memories 3200 for storing instructions 3210 .
  • data may also be stored in the memory 3200 .
  • the processor and memory can be set separately or integrated together.
  • the communication device 3000 may further include a transceiver 3300 and/or an antenna 3400 .
  • the transceiver 3000 can be used to send information to other devices or receive information from other devices.
  • the transceiver 3300 may be called a transceiver, a transceiver circuit, an input-output interface, etc., and is used to realize the transceiver function of the communication device 3000 through the antenna 3400 .
  • the transceiver 3300 includes a transmitter (transmitter) and a receiver (receiver).
  • the transmitter can be used to generate a radio frequency (radio frequency) signal from a baseband signal
  • the receiver can be used to convert the radio frequency signal into a baseband signal.
  • the communication device 3000 may further include one or more of the following components: a wireless communication module, an audio module, an external memory interface, an internal memory, a universal serial bus (universal serial bus, USB) interface, a power management module, an antenna, Speakers, microphones, I/O modules, sensor modules, motors, cameras, or displays, etc.
  • a wireless communication module an audio module
  • an external memory interface an internal memory
  • a universal serial bus universal serial bus, USB
  • a power management module an antenna
  • Speakers microphones, I/O modules, sensor modules, motors, cameras, or displays, etc.
  • the processor 3100 executes the instructions stored in the communication device 3000, that is, the instructions stored in the communication device can be executed on the processor 3100, so that the communication device 3000 executes the methods described in the above embodiments.
  • the instruction is an instruction 3110 in the processor, or the instruction is an instruction 3210 in the memory.
  • an instruction may also refer to a computer program, code, program code, program, application program, software, or executable file.
  • computer programs or codes stored in the communication device 3000 I won't repeat them in other places.
  • the communication apparatus 3000 may be used to implement the method corresponding to the terminal device in the above embodiment of the application, and for specific functions, refer to the description in the above embodiment.
  • the communication apparatus 3000 includes a processor 3100, and the processor 3100 is configured to execute a computer program or an instruction, so that the method corresponding to the terminal device in the above application embodiment is executed.
  • the method corresponding to the terminal device in the foregoing application embodiment includes: determining a first physical resource, where the first physical resource is the physical resource to which the first PBCH and the first PBCH DMRS are mapped; receiving the first PBCH and the first PBCH DMRS; wherein, the first PBCH is the PBCH in the first SSB, the first SSB occupies 4 symbols in the time domain, and occupies X subcarriers in the frequency domain, and the X is less than 240 positive integer.
  • the method corresponding to the terminal device in the above-mentioned application embodiment includes: determining the first physical resource according to the first frequency domain pattern or the first resource element RE pattern, and the first frequency domain pattern or the first RE pattern is The second frequency domain pattern or a part of the second RE pattern; receiving a first PBCH, where the first PBCH is located in the first physical resource.
  • the method corresponding to the terminal device in the foregoing application embodiment includes: receiving the first PBCH; acquiring system information carried by the first PBCH, where the number of bits of the system information is less than 32.
  • the communication apparatus 3000 may be used to implement the method corresponding to the network device in the above-mentioned application embodiment, and for specific functions, refer to the description in the above-mentioned embodiment.
  • the communication device 3000 includes a processor 3100, and the processor 3100 is configured to execute a computer program or an instruction, so that the method corresponding to the network device in the above application embodiment is executed.
  • the method corresponding to the network device in the above-mentioned application embodiment includes: mapping the first PBCH to the first physical resource; sending the first PBCH; wherein, the first PBCH is a PBCH in the first SSB, and the The first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the method corresponding to the network device in the above application embodiment includes: mapping the first PBCH to the first physical resource according to the first frequency domain pattern or the first resource element RE pattern, and the first frequency domain pattern or the first resource element RE pattern An RE pattern is the second frequency domain pattern or a part of the second RE pattern; the first PBCH is sent, and the first PBCH is located in the first physical resource.
  • the method corresponding to the network device in the foregoing application embodiment includes: generating system information carried by the first PBCH, where the number of bits of the system information is less than 32; and sending the first PBCH.
  • the communication device 3000 is a functional entity (also referred to as a functional unit, logical network element, etc.) in the network equipment, which can realize some physical layer functions and radio frequency functions in the network equipment.
  • the communication device 3000 in the third implementation manner is denoted as the communication device 3000a.
  • the communication device 3000a may be a network element in a hardware device, or a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • the communication device 3000 a includes one or more processors 3100 , and further includes a transceiver 4300 and/or an antenna 4400 .
  • processors 3100 are also included to store instructions.
  • Processor 3100 is a transceiver processor.
  • the transceiver processor includes a sending processor and a receiving processor.
  • the transceiver processor can implement signal processing related to physical layer functions and radio frequency functions.
  • the physical layer is a lower layer in the physical layer.
  • the underlying functions in the physical layer include precoding, physical resource mapping, physical antenna mapping, and/or, inverse fast Fourier transformation (IFFT).
  • IFFT inverse fast Fourier transformation
  • the underlying functions in the physical layer include physical resource demapping, physical antenna demapping, and/or fast Fourier transformation (fast Fourier transformation, FFT), etc. It should be noted that, the embodiment of the present application does not limit the function division of the upper layer and the lower layer in the physical layer.
  • the communication device 3000a includes a processor 3100, and the processor 3100 is configured to execute a computer program or an instruction, so that the method corresponding to the network device in the above application embodiment is executed. As shown in FIG. 11 , the communication device 3000a can communicate with the terminal equipment.
  • the method corresponding to the network device in the above-mentioned application embodiment includes: mapping the first PBCH to the first physical resource; sending the first PBCH to the terminal device; wherein, the first PBCH is the first PBCH in the first SSB
  • the first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the method corresponding to the network device in the above application embodiment includes: mapping the first PBCH to the first physical resource according to the first frequency domain pattern or the first resource element RE pattern, the first frequency domain pattern or the first resource element RE pattern
  • the first RE pattern is the second frequency domain pattern or a part of the second RE pattern
  • the first PBCH is sent to the terminal device, and the first PBCH is located in the first physical resource.
  • the communication apparatus 3000 is a functional entity (also referred to as a functional unit, a logical network element, etc.) in the network equipment, and can realize some functions of the network equipment (eg, DU function).
  • the communication device 3000 in the fourth implementation manner is denoted as the communication device 3000b.
  • the communication device may be a network element in a hardware device, or a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • the communication device 3000b includes one or more processors 3100 and also includes one or more memories 3200 , but does not include a transceiver 3300 and an antenna 3400 .
  • the communication device 3000b may include functions of a physical layer, media access control (Media Access Control, MAC) and radio link control (radio link control, RLC).
  • the processor 3100 can implement signal processing related to MAC, RLC and physical layer functions.
  • the physical layer is an upper layer in the physical layer.
  • functions of higher layers in the physical layer may include channel coding, scrambling, modulation, and/or layer mapping.
  • functions of higher layers in the physical layer may include channel decoding, descrambling, demodulation, and/or de-layer mapping.
  • the communication device 3000b can communicate with the communication device 3000a.
  • the communication device 3000a is a functional entity in the network equipment, including a radio frequency function and some physical layer functions. For a specific description, refer to the above, and details will not be repeated here.
  • the communication device 3000b includes a processor 3100, and the processor 3100 is configured to execute a computer program or an instruction, so that the method 1, 2 or 3 is executed.
  • the processor 3100 is configured to execute a computer program or an instruction, so that the method 1, 2 or 3 is executed.
  • method one includes: encoding and modulating the system information carried by the first PBCH; sending the modulation symbol of the first PBCH to the communication device 3000a; wherein, the first PBCH is a PBCH in the first SSB, and the The first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the second method includes: encoding and modulating the system information carried by the first PBCH according to the first frequency domain pattern or the first RE pattern; sending the modulation symbol of the first PBCH to the communication device 3000a; wherein, the first The frequency domain pattern or the first RE pattern is a part of the second frequency domain pattern or the second RE pattern.
  • the third method includes: encoding and modulating the system information carried by the first PBCH; sending the modulation symbol of the first PBCH to the communication device 3000a; wherein, the number of bits of the system information is less than 32.
  • the communication apparatus 3000 is a functional entity (also referred to as a functional unit, a logical network element, etc.) in the network device, and can realize some functions of the network device (eg, CU function).
  • the communication device 3000 in the fourth implementation manner is denoted as the communication device 3000c.
  • the communication device 3000c includes one or more processors 3100 and also includes one or more memories 3200 , but does not include a transceiver 3300 and an antenna 3400 .
  • the communication device may include functions of a packet data convergence protocol (packet data convergence protocol, PDCP) and RRC.
  • PDCP packet data convergence protocol
  • RRC Radio Resource Control
  • the communication device 3000c can communicate with the communication device 3000b.
  • the communication device 3000b is a functional entity in the network equipment, including MAC, RLC and some physical layer functions. The specific description refers to the above, and will not be repeated here.
  • the communication device 3000c includes a processor 3100, and the processor 3100 is configured to execute a computer program or an instruction, so that the method 1 or 2 is executed, and for a specific description, refer to the above-mentioned embodiments.
  • method one includes: generating system information carried by the first PBCH; sending the system information to the communication device 3000b; wherein, the first PBCH is the PBCH in the first SSB, and the first SSB occupies the time domain 4 symbols occupy X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the second method includes: generating system information carried by the first PBCH; sending the system information to the communication device 3000b; wherein, the number of bits of the system information is less than 32.
  • the processor 3100 and the transceiver 3300 described in this application can be implemented in integrated circuit (integrated circuit, IC), analog IC, radio frequency integrated circuit (radio frequency identification, RFID), mixed signal IC, application specific integrated circuit (application specific integrated circuit) , ASIC), printed circuit board (printed circuit board, PCB), or electronic equipment, etc.
  • the communication device described herein can be an independent device (for example, an independent integrated circuit, a mobile phone, etc.), or it can be a part of a larger device (for example, a module that can be embedded in other devices).
  • a module for example, a module that can be embedded in other devices.
  • Fig. 12 is a simplified structural schematic diagram of a network device provided by an embodiment of the present application, for example, it may be a simplified structural schematic diagram of a base station.
  • the network device 5000 can be applied to the system shown in FIG. 1 to perform the operations or functions of the network device in the above method embodiments. For details, refer to the descriptions in the above method embodiments, which will not be repeated here.
  • the network device 5000 includes: a processor 5101 , a memory 5102 , a radio frequency unit 5201 and an antenna 5202 .
  • the processor 2101 is configured to support the network device to execute the functions of the network device in the foregoing method embodiments.
  • Processor 5101 may be one or more processors.
  • the one or more processors may support radio access technologies of the same standard, or may support radio access technologies of different standards (for example, LTE and NR).
  • the processor 5101 is an integrated circuit, such as one or more ASICs, or one or more DSPs, or one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the memory 5102 is also called a storage unit and is used to store instructions and/or data.
  • the memory 5102 may be one memory, or may be a general term for multiple memories or storage elements.
  • the memory 5102 and the processor 5101 may be located in the same chip or on different chips.
  • the radio frequency unit 5201 may be one or more radio frequency units.
  • the antenna 5202 is mainly used for sending and receiving radio frequency signals in the form of electromagnetic waves, for example, for the network device 5000 to send signals to terminal devices or receive signals.
  • the baseband unit 5100 includes a processor 5101 and a memory 5102, which are mainly used for baseband processing of signals, managing wireless resources, providing transmission management and interfaces, and providing functions such as clock signals.
  • the BBU 5100 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network (such as an LTE network) of a single access standard, or may separately support wireless access networks of different access standards. Access network (such as LTE network, 5G network or other networks).
  • the memory 5101 and the processor 5102 may serve one or more boards. That is to say, memory and processors can be set independently on each single board. It may also be that multiple single boards share the same memory and processor. In addition, necessary circuits can also be set on each single board.
  • the transceiver unit 5200 includes a radio frequency unit 5201 and an antenna 5202, which are mainly used for transceiving radio frequency signals and converting radio frequency signals to baseband signals.
  • the radio frequency unit 5201 is a remote radio unit (remote radio unit, RRU), and the RRU and the BBU may be physically set together or physically separated, that is, a distributed base station.
  • RRU remote radio unit
  • the transceiver unit 5200 may be an Active Antenna Unit (Active Antenna Unit, AAU), which is a hardware product that integrates a radio frequency function with an antenna.
  • AAU Active Antenna Unit
  • the radio frequency unit 5201 in the AAU refers to a radio frequency module dedicated to the AAU, which has the same function as the RRU.
  • the AAU may also include some baseband processing functions.
  • the BBU 5100 can be used to execute the actions internally implemented by the network device described in the previous method embodiments, and the transceiver unit 5200 can be used to perform the sending or receiving from the network device to the terminal device described in the previous method embodiments Actions.
  • the transceiver unit 5200 can be used to perform the sending or receiving from the network device to the terminal device described in the previous method embodiments Actions.
  • the network device 5000 includes a processor 5101, and the processor 5101 is configured to execute computer programs or instructions, so that the methods corresponding to the network device in the above application embodiments are executed.
  • the method corresponding to the network device in the above-mentioned application embodiment includes: mapping the first PBCH to the first physical resource; sending the first PBCH; wherein, the first PBCH is a PBCH in the first SSB, and the The first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the method corresponding to the network device in the above application embodiment includes: mapping the first PBCH to the first physical resource according to the first frequency domain pattern or the first resource element RE pattern, the first frequency domain pattern or the first resource element RE pattern
  • the first RE pattern is the second frequency domain pattern or a part of the second RE pattern; the first PBCH is sent, and the first PBCH is located in the first physical resource.
  • the method corresponding to the network device in the foregoing application embodiment includes: generating system information carried by the first PBCH, where the number of bits of the system information is less than 32; and sending the first PBCH.
  • FIG. 13 is a schematic diagram of a simplified structure of a terminal device provided by an embodiment of the present application.
  • the terminal device 6000 can be applied to the system shown in FIG. 1 to perform the operations or functions of the terminal device in the above method embodiments. For details, refer to the description in the above method embodiments, which will not be repeated here.
  • the terminal device 6000 includes a processor 6100 , a memory 6200 , a radio frequency circuit 6300 and an antenna 6400 .
  • the processor 6100 is mainly used to process communication protocols and communication data, control the terminal, execute instructions, process data, and so on.
  • the processor 6100 may also be called a processing unit, a processing board, a processing module, a processing device, and the like.
  • the memory 6200 is mainly used to store instructions (also sometimes referred to as computer programs or codes) and data.
  • a memory may also be called a storage medium or a storage device.
  • the radio frequency circuit 6300 is mainly used for converting baseband signals and radio frequency signals and processing radio frequency signals.
  • the antenna 6400 is mainly used for sending and receiving radio frequency signals in the form of electromagnetic waves, for example, for the terminal device 6000 to send signals to or receive signals from network devices.
  • the terminal device 6000 further includes an input and output device 6500, such as a touch screen, a display screen, a microphone, and a keyboard, etc., which are mainly used to receive user input data and output data to the user.
  • FIG. 13 only shows a memory and a processor. In an actual terminal product, the terminal device 6000 may include multiple processors and/or multiple memories.
  • the terminal device 6000 is a mobile phone.
  • the processor 6100 can read the software program in the memory 6200, interpret and execute the instructions of the software program, and process the data of the software program.
  • the processor 6100 performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit 6300, and the radio frequency circuit 6300 performs radio frequency processing on the baseband signal, and sends the radio frequency signal outward in the form of electromagnetic waves through the antenna 6400 send.
  • the radio frequency circuit 6300 receives the radio frequency signal through the antenna 6400, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor 6100, and the processor 6100 converts the baseband signal into data and performs The data is processed.
  • the processor 6100 includes a baseband processor and a central processing unit, the baseband processor is mainly used to process communication protocols and communication data, and the central processor is mainly used to control the entire terminal device 6000 and execute software programs , to process data for software programs.
  • the terminal device 6000 may include multiple baseband processors to adapt to different network standards, the terminal device 6000 may include multiple central processors to enhance its processing capability, and various components of the terminal device 6000 may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit may also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the processor 6100 and the memory 6200 may be regarded as a processing device 6600 of the terminal device 6000 .
  • the processing device 6600 may be a chip.
  • the processing device 6600 may be a general-purpose processor, DSP, ASIC, off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or
  • a system on chip (SoC) can also be a CPU, a network processor (network processor, NP), a microcontroller (micro controller unit, MCU), or a programmable controller ( programmable logic device, PLD) or other integrated chips.
  • the radio frequency circuit 6300 and the antenna 6400 may be regarded as the transceiver unit 6700 of the terminal device 6000 .
  • the transceiver unit 6700 may also be called a transceiver, a transceiver, a transceiver device, and the like.
  • the device used by the transceiver unit to realize the receiving function can be regarded as the receiving unit, and the device used to realize the sending function in the transceiver unit can be regarded as the sending unit.
  • the receiving unit may also be called a receiver, receiver, receiving circuit, etc.
  • the sending unit may be called a transmitter, transmitter, or transmitting circuit, etc.
  • the processing device 6600 can be used to execute the actions described in the previous method embodiments implemented by the terminal device, and the transceiver unit 6700 can be used to perform the actions described in the previous method embodiments that the terminal device sends to or receives from the network device .
  • the transceiver unit 6700 can be used to perform the actions described in the previous method embodiments that the terminal device sends to or receives from the network device .
  • the terminal device 6000 includes a processor 6100, and the processor 6100 is configured to execute computer programs or instructions, so that the methods corresponding to the terminal device in the above-mentioned application embodiments are executed.
  • the method corresponding to the terminal device in the foregoing application embodiment includes: determining a first physical resource, where the first physical resource is a physical resource to which the first PBCH is mapped; receiving the first PBCH, the The first PBCH is located in the first physical resource; wherein, the first PBCH is the PBCH in the first SSB, and the first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, and the X It is a positive integer less than 240.
  • the method corresponding to the terminal device in the above-mentioned application embodiment includes: determining the first physical resource according to the first frequency domain pattern or the first resource element RE pattern, and the first frequency domain pattern or the first RE pattern is The second frequency domain pattern or a part of the second RE pattern; receiving a first PBCH, where the first PBCH is located in the first physical resource.
  • the method corresponding to the terminal device in the foregoing application embodiment includes: receiving the first PBCH; acquiring system information carried by the first PBCH, where the number of bits of the system information is less than 32.
  • the terminal device and/or the network device may perform some or all of the steps in the embodiment of the present application, these steps or operations are only examples, and the embodiment of the present application may also perform other operations or various Operational deformation.
  • each step may be performed in a different order presented in the embodiment of the present application, and it may not be necessary to perform all operations in the embodiment of the present application.
  • FIG. 14 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • the communication device 7000 includes a processing unit 7100 and a transceiver unit 7200 .
  • the processing unit 7100 may also be called a processing module, and the transceiver unit 7200 may also be called a transceiver module.
  • the processing unit 7100 may be implemented by a processor or processor-related circuit components.
  • the transceiver unit 7200 may be a functional module, capable of both sending and receiving operations. For example, when performing a sending operation, the transceiver unit can be considered as a sending unit, and when performing a receiving operation, the transceiver unit can be considered as a receiving unit.
  • the transceiver unit 7200 may also be two functional modules, including a sending unit and a receiving unit.
  • the communication device is a system-on-a-chip
  • the transceiver unit may be an input-output interface of a chip (such as a baseband chip)
  • the processing unit may be a processor of the system-on-a-chip.
  • the communications apparatus 7000 is a terminal device, a chip used in the terminal device, or other combined devices, components, etc. that have functions of the above-mentioned terminal device.
  • the processing unit 7100 is used to determine the first physical resource; the transceiver unit 7200 is used to receive the first PBCH; wherein, the first physical resource is the physical resource to which the first PBCH is mapped, and the first PBCH is the first
  • the first SSB occupies 4 symbols in the time domain and X subcarriers in the frequency domain, where X is a positive integer less than 240.
  • the processing unit 7100 is configured to determine the first physical resource according to the first frequency domain pattern or the first resource element RE pattern; the transceiver unit 7200 is configured to receive the first PBCH; wherein, the first frequency domain pattern or the first The RE pattern is the second frequency domain pattern or a part of the second RE pattern.
  • the transceiving unit 7200 is configured to receive the first PBCH; the processing unit 7100 is configured to acquire system information carried by the first PBCH; wherein, the number of bits of the system information is less than 32.
  • the communication apparatus 7000 is a network device, a chip applied in the network device, or other combined devices, components, etc. having the functions of the above network device.
  • the processing unit 7100 is used to map the first PBCH to the first physical resource; the transceiver unit 7200 is used to send the first PBCH; wherein, the first PBCH is the PBCH in the first SSB, and the first SSB is in Four symbols are occupied in the time domain, and X subcarriers are occupied in the frequency domain, where X is a positive integer less than 240.
  • the processing unit 7100 is used to map the first PBCH to the first physical resource according to the first frequency domain pattern or the first resource element RE pattern; the transceiver unit 7200 is used to send the first PBCH;
  • the domain pattern or the first RE pattern is part of the second frequency domain pattern or the second RE pattern.
  • the processing unit 7100 is configured to generate system information carried by the first PBCH; the transceiver unit 7200 is configured to send the first PBCH; wherein, the number of bits of the system information is less than 32.
  • the present application also provides a computer-readable storage medium.
  • the computer-readable storage medium stores computer programs or instructions. When the computer programs or instructions are executed, the above-mentioned method embodiments performed by the network device or the terminal device are implemented. method. In this way, the functions described in the above embodiments can be realized in the form of software function units and sold or used as independent products. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product in essence or the part that contributes to it or the part of the technical solution.
  • the computer software product is stored in a storage medium, including several instructions for So that a computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the methods described in the various embodiments of the present application.
  • the storage medium includes: a U disk, a mobile hard disk, a read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and other various media that can store program codes.
  • the present application also provides a computer program product, the computer program product includes: computer program code, when the computer program code is run on the computer, the computer is made to execute any method described above by the terminal device or the network device Methods.
  • the present application also provides a system, which includes a terminal device and a network device.
  • the embodiment of the present application also provides a processing apparatus, including a processor and an interface; the processor is configured to execute the method performed by the terminal device or the network device involved in any one of the above method embodiments.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the division of this unit is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored, or not implement.
  • the mutual coupling, or direct coupling, or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • a unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a high-density digital video disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disc, SSD)
  • references to "an embodiment” throughout this specification mean that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.
  • first and second mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority or importance etc.
  • first PDSCH and the second PDSCH can be the same physical channel or different physical channels, and this name does not mean the amount of information, content, priority or importance of the two physical channels. varying degrees.
  • At least one means one or more, and “multiple” means two or more.
  • At least one item or similar expressions refer to one item or multiple items, that is, any combination of these items, including any combination of a single item or plural items.
  • at least one item (piece) of a, b, or c means: a, b, c, a and b, a and c, b and c, or a and b and c.
  • the above is an example of the three elements of A, B and C to illustrate the optional items of the project.
  • the expression is "the project includes at least one of the following: A, B, ..., and X"
  • the applicable entries for this item can also be obtained according to the aforementioned rules.
  • a and/or B may indicate: A exists alone, and A and B exist simultaneously. B, the case where B exists alone, where A and B can be singular or plural.
  • the character "/" generally indicates that the contextual objects are an "or" relationship.
  • A/B means: A or B.
  • a corresponds to B means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande concerne un procédé de communication et un appareil de communication. Un dispositif terminal détermine des premières ressources physiques, et reçoit un premier PBCH et un premier PBCH DMRS sur les premières ressources physiques. En conséquence, un dispositif de réseau mappe le premier PBCH aux premières ressources physiques, et envoie le premier PBCH, les premières ressources physiques étant des ressources physiques occupées par le premier PBCH et le premier PBCH DMRS dans une première SSB, la première SSB occupant quatre symboles dans un domaine temporel et occupant X sous-porteuses dans un domaine fréquentiel, et X étant un nombre entier positif supérieur à 127 et inférieur à 240. La présente demande permet de résoudre le problème de transmission du PBCH à bande étroite, et d'améliorer les performances de transmission du PBCH à bande étroite.
PCT/CN2022/110478 2021-08-11 2022-08-05 Procédé de communication et appareil de communication WO2023016359A1 (fr)

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